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A140512 Limit of A140485 (1, 4, 9, 13) table signed.Denominators of a sequence whose numerators are 1's. +0
1
1, -2, 3, -7, 10, -12, 15, -17, 20, -24, 27, -35 (list; graph; listen)
OFFSET

0,2

COMMENT

With transform in A129891 or A100597 the converging sequence becomes a polynomial family whose roots are on a curve (in imaginary coordinates). See P. Flajolet, X. Gourdon, B. Salvy.

REFERENCES

P. Flajolet, X. Gourdon, B. Salvy, Gazette des mathematiciens, 1993, 55, pp. 67-78.

CROSSREFS

Sequence in context: A051471 A047531 A102808 this_sequence A101956 A002238 A002255

Adjacent sequences: A140509 A140510 A140511 this_sequence A140513 A140514 A140515

KEYWORD

sign,uned

AUTHOR

Paul Curtz (bpcrtz(AT)free.fr), Jul 01 2008

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Last modified November 24 14:25 EST 2009. Contains 167438 sequences.


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